Elastic Critical Moment

EN 1993-1-1:2005+A1:2014 Clause tells you to use \(M_{cr}\) with no clues on how to calculate it. \(M_{cr}\) is a purely theoretical value independent of any design code, so you can use any method you like to calculate it.

While any modern finite element package will calculate \(M_{cr}\), some codes offer hand methods: